In the past, leading points causing intussusception were identified either during barium enema performed for reduction of the invaginated bowel or during surgery. A persistent filling defect in the ileocecal region or in the colon was the hallmark of a possible causative factor for the intussusception. In recent years, the ultrasonographic features of intussusception have been defined, and occasionally a leading point has been shown. We present a 4-month-old child in whom an intussusception was diagnosed by ultrasound examination. A duplication cyst was identified in close proximity to the intussusception and was suspected to be the causative factor. This was shown by computed tomography and confirmed at surgery.
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